Improvement in clock-escapements



No. 39.395. PATENTED AUG. 4, 1863.

W. HART. ESGAPEMENT.

of Wisconsin, have invented new and Imreference being had to the accompanying draw- UNITED STATES PATENT OFFICE.

WILLIAM HAl'l", 0]? MAYVILLE, WISCONSIN.

lMPROVEMENT IN CLOCKESCAPEMENTS.

Specification forming part of Letters Patent No. 39,395, dated August 4, l-l i To all whom it may concern:

Be it known that I, WILLIAM HART, of Mayville, in the county of Dodge and State proved Pendulum Escapement for Clocks; and I do hereby declare that the following is a full, clear, and exact description of the same,

ings, forming part of this specification, in which- Figures 1 and 2 are front views of my escapeinent,showingthe position of the parts at the end of each stroke of the pendulum.

Similar letters of reference indicate corresponding parts in both figures.

This invention consists in a certain novel arrangement of an impulsepallet and dctent, in combination with a pend ulum, wherebythe pendulum has the power applied to itdirectly from the crown-wheel, and many other advan tages are obtained.

To enable others skilled in the art to make and apply my invention, 1 will proceed to describe its construction and operation.

A is the pendulum, arranged to swing from the stationary support a in the same plane, or as nearly so as practicable, with the escapewheel B, and having the impulse-pallet I) so fitted to it and secured by a wedge, c, that itcan be adjusted higher or lower to enable it to receive the impulse from the wheel in a proper manner. The escape-wheel is of ordinary construction,

f is the detent, secured in one arm of a lever, G, which is arranged to vibrate in the same plane with the escape-wheel and pendulum-rod on a stationary pin, d, arranged below the said wheel. The other arm of the said lever, which is farther from the pendn lum-rod, has secured in it a bent wire, 1), the upper end of which is flattened to form a guard, g, to prevent damage through carelessness or accident by stopping the wheel, and the lower part of which is acted upon by the pendulum'rod to withdraw the decent from contact with the wheel.

e isa stationary pin, against which the wir D is brought by its own weight and that of the lever 0, when the pendulum-rod is out of I contact with it, and which serves to stop the detent at aproper depth in the wheel.

In the movement of the pendulum-rod to the left, the said rod comes in contact with the lower part of the wire I), and by that means causes the said rod and the lever O to move in such manner (illustrated in Fig. 2) as to withdraw the detcntf from the wheel 1 and the same movement brings theimpulse-pallet 1) between two of the teeth of the said wheel, so that on the escape of the said'wheel it only moves a distance equal to half of one of the spaces between its teeth before it is arrested by the said pallet, which then receives the impulse and transmits it to the pendulum, producing the movement of the latter to the right. In the latter movement of the pendulum the impulse'pallet passes out of the wheel and leaves the latter free to move the same distance as before mentioned, when it is arrested, as shown in Fig. l, by the detent, which owing to the retirement of the pendulum from the wirelLis brought by the weightof the said wire and of the lever 0 within the circle circumscribing the points of'the teeth of the wheel.

The guard g, though it enters between two teeth ot the wheel at every movement of the pendulum to the left, never touches the teeth except from any accidental cause the wheel is freed both from the impulse-pallet and detent.

To facilitate the adjustment of the escapement the pendulumsupport a is secured to a movable arm,E, and the pin cl,npon which the lever 0 works, is secured. to ajmovable arm, F.

The depth to which the detent enters the wheel may be regulated by bending the wire D above the pin 0.

The advantages obtained by my escapeinent, besides the direct application of the power to the pendulum, which greatly reduces the friction, are manifold; but I will only mention afew of the most important ones viz., greater accuracy of time, greater durability, less liability to get out of order, and consequent saving in repairs, cheaper construction, facility of adjustment, and capability of working with less power.

The escapement may be easily applied to old clocks, and can be with especial advantage and withtliependulum-rod and escape-wheel, to those which are useless for want of suffito operate substantially asherein specified.

cient motive power. v 2. The guard g, applied in combination with 1 my invention, and desire the detent-lcver U, to operate substantially as What I claim as to secure by Letters Patent, isandfor the purpose herein specified.

1. The arrangement of the impulse-pallet Witnesses: WILLIAM HART. b,'detent f, lever'G, wire D, or its equivalent, D. NABER, Jr'., and stop-pin e, in combination with each other CHAS. L. CLASQN. 

